﻿/*                       NOTICE
 * 
 * This software was produced for the U. S. Government
 * under Contract No. FA8721-10-C-0001, and is
 * subject to the Rights in Noncommercial Computer Software
 * and Noncommercial Computer Software Documentation Clause
 * (DFARS) 252.227-7014 (JUN 1995)
 * 
 * Approved for Public Release: 11-2435
 * © 2011 The MITRE Corporation. All Rights Reserved. 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;

namespace MXSE.MultiTouch.Gestures
{
    public class HoldSlideGesture : ComplexGesture
    {
        public Vector3 lastMove;

        public HoldSlideGesture(HoldGesture hold, DragGesture drag)
        {
            AddBasic(hold);
            AddBasic(drag);
        }

        public HoldSlideGesture(DragGesture drag, SlideGesture slide)
        {
            AddBasic(drag);
            AddBasic(slide);
        }

        public override void Update()
        {
            base.Update();
            Vector3 currentPosition = Basics[1].currentPosition;
            if (Vector3.Distance(currentPosition, lastMove) > 0.001)
            {
                lastMove = currentPosition;
                Vector3 startPosition = Basics[1].startPosition;
                float newX = currentPosition.X - startPosition.X;
                float newY = currentPosition.Y - startPosition.Y;

                contactManager.recognizer.publishMessage(
                    "HoldSlide " + Id + " moved to " + newX + ", " + newY,
                    "HoldSlideChange",
                    Id,
                    0, 0, 0, 0, newX, newY
                );
            }
        }

        public override bool Destroyed()
        {
            return base.Destroyed();
        }

        public override void Start()
        {
            BasicGesture first = Basics[0];
            BasicGesture second = Basics[1];
            Id = first.Id + second.Id;
            Vector3 anchor = first.currentPosition;
            first.startPosition = anchor;
            lastMove = second.startPosition = second.currentPosition;

            contactManager.recognizer.publishMessage(
                "Started HoldSlide " + Id + " with anchor " + anchor.X + ", " + anchor.Y,
                "HoldSlideStart",
                Id,
                0, 0, 0, 0, anchor.X, anchor.Y
            );
        }

        public override void OnDeath()
        {
            Basics[0].Parent = null;
            Basics[1].Parent = null;
            contactManager.recognizer.publishMessage(
                "HoldSlide " + Id + " ended.",
                "HoldSlideEnd",
                Id,
                0, 0, 0, 0, 0, 0
            );
        }
    }
}
